The following exhibit displays the MAC address table of a switch in your network, along with the location of eachdevice connected to the switch:
Which of the following frames will be flooded to all ports after it is received by the switch?
A.
source MAC: 12-34-56-78-9A-BD, destination MAC: 12-34-56-78-9A-BF
B.
source MAC: 12-34-56-78-9A-BF, destination MAC: 12-34-56-78-9A-BD
C.
source MAC: 12-34-56-78-9A-BF, destination MAC: 12-34-56-78-9A-BC
D.
source MAC: 12-34-56-78-9A-BC, destination MAC: 12-34-56-78-9A-BF
Explanation:
The frame with a source MAC of 12-34-56-78-9A-BF and a destination MAC of 12-34-56-78-9A-BC would be
sent to all ports because the destination MAC address is not already in the MAC address table.
The frame with a source MAC of 12-34-56-78-9A-BD and a destination MAC of 12-34-56-78-9A-BF would not
be sent to all ports because the destination MAC address is in the MAC address table.
The frame with a source MAC of 12-34-56-78-9A-BF and a destination MAC of 12-34-56-78-9A-BD would not
be sent to all ports because the destination MAC address is in the MAC address table.
The frame with a source MAC of 12-34-56-78-9A-BC and a destination MAC of 12-34-56-78-9A-BF would not
be sent to all ports because the destination MAC address is in the MAC address table.
Objective:
LAN Switching Fundamentals
Sub-Objective:
Interpret Ethernet frame formatReferences:
Cisco Press > Articles > Cisco Certification > CCNA Routing and Switching > Basic Data Transmission in
Networks: MAC Tables and ARP Tables
How do Switches Work?